William deiscoll



(No Model.)

W. DRISGOLL.

MECHANISM FOR FINISHING STOPPBRS FOR STEEL LADLES.

Patented Oct. 25,1881.

INVENIOR BY J51 ATTORNEYS WITNESSES lUNrre 'IA'IES FATENI rrrcn.

\VILLIAH DRISGOLL, OF TAUNTON, MASSACHUSETTS, ASSIGNOR TO HIMSELF AND HENRY D. ATWOOD, OF SAME PLACE.

MECHANISM FOR FINISHING STOPPERS FOR STEEL LADLES.

SPECIFICATION forming part of Letters Patent No. 248,721, dated October 25, 1881.

Application filed April 7, 1881.

To all whom it may concern:

Be it known that I, WILLIAM DRISCOLL, of Taunton, in the county of Bristol and State of Massachusetts, have im'ented a new and useful Improvement in Mechanism for.Finishing Stoppers for Steel Ladles, of which the following is a specification.

Figure l is a sectional side elevation of a part of my improvement and of a stopper placed upon it. Fig.2isasideelevatiompartly in section, of another part of the improvement. Fig. 3 is aplan view of the part of the improvement shown in Fig. 1. Fig. 4 is a plan view of both parts of the improvement, illustrating their use.

Similar letters of reference indicate corresponding'parts.

The object of this invention is to facilitate the finishing of stoppers for steel ladies and other uses.

The invention consists in constructing a mechanism for finishing stoppers for steel ladies, with a block having a recess to receive, fit upon, and smooth the convexed head of the stopper, a pin to pack and smooth the inner surface of the bore of the stopper, and a lever having a socket to receive the center pin, and a slot to receive the knife, and its set-screw for rabbetin g the base of the stopper, all constructed and operating as will be hereinafter fully described.

A represents a block of wood, metal, or other suitable material, and which has a screw-hole formed in its base, or in a projection formed upon its base, to receive the screw that secures it to a potters wheel or other revolving wheel or table.

In the upper side of the block A is formed a cup-shaped recess or cavity,B,of such a size and shape as to receive and fit upon the convexed or rounded end of a stopper, 0, as shown in Fig. 1.

To the block A, in the center of its recess B, is secured by a screw, D, the base of a pin, E, which has a shoulder, F,upon its lower part to receive the shoulder in the base of the stop per 0, as shown in Fig. 1. The enlarged lower part of the pin E is made smaller than the enlarged forward part of the bore of the stop (No model.)

per 0. The smaller upper part of the pin Eis made of the exact size of the required bore of the stopper. With this construction, when the stopper 0 has been brought to the proper shape and size, the bore formed through it, and the enlargement in the forward end of the bore formed in the ordinary manner, the stopper 0 is placed upon the pin E, with the head of the said stopper resting in the recess B of the block A. By this operation the revolving pin E packs and smooths and thus finishes the inner surface of the bore of the stopper 0, and the concaved surface of the block Apacks and smooths and thus finishes the convexcd surface of the head of the said stopper.

With careful manipulation the recessed block A and the pin E can be used separately; but I prefer to use them together, as in this way the operator can more readily keep the various parts of the stopper exactly true.

To form the rabbet in the base of the stopper 0 the tool shown in Fig. 2 is used, which consists of the lever G and knife H. The lever G has a socket, I, formed in its end to receive and fit upon the projecting end of the pin E.

In the lever G, at a suitable distance from the socket I, is formed a slot, J, to receive the knife H, which is secured in place by a setscrew, K, passing in through a screwhole in the rear side of the lever G, and resting against the rear side of the knife H. The forward end of the knife H is made square and at right angles with the length of the said knife. The forward end of the inner edge of the knife H is beveled, as shown in Fig. 2, to give the de- 8 sired bevel to the shoulder of the stopper 0. The part of the lever Gr in front of the middle part of the knife H is cut away to allow the chips to escape freely.

The slot J should be made a little longer than the width of the knife H, to allow the knife to be conveniently adjusted.

Having thus fully described my invention, I claim as new and desire to secure by Letters Patent 1. A mechanism for finishing stoppers for steel ladles, constructed substantially as herein shown and described, consisting of the block A, having recess B, the pin E, having shoul- 3. In a mechanism for finishing stoppers for der F, the lever G, having socket I and slot J, steel ladies, the combination,with the lever G, the knife H, and the set-screw K, as set forth. having socket I and slot J, of the knife H and 2. In a, mechanism for finishing stoppers for set-screw K, substantially as herein shown and 5 steel ladles, the pin E, constructed, substandescribed, whereby a rabbet can be formedin 15 tially as herein shown and described, with athe base of the stopper, as set forth.

shoulder, F, to receive the shoulder in the bore \VILLIAM DRISCOLL. of the stopper, whereby the inner surface of Witnesses: thebore of the stopper ispacked and smoothed, HENRY D. ATWOOD,

IO as set forth. l THOMAS C. MARLEY. 

